Sent to an application by the IME to notify the application of a key release and to keep message order. A window receives this message through its WindowProc function.
A handle to window.
Virtual key code of the key.
Repeat count, scan code, extended key flag, context code, previous key state flag, and transition state flag, as shown below.
Bit Meaning 0-15 Repeat count. This value is always 1. 16-23 Scan code. 24 Extended key. This value is 1 if it is an extended key. Otherwise, it is 0. 25-28 Not used. 29 Context code. This value is always 0. 30 Previous key state. This value is always 1. 31 Transition state. This value is always 1.
An application should return 0 if it processes this message.
Minimum supported client
|Windows 2000 Professional [desktop apps only]|
Minimum supported server
|Windows 2000 Server [desktop apps only]|